Shuffle within questions

If you enable this option, then the parts making up the individual
questions will be randomly shuffled each time a student
starts an attempt at this quiz, provided the option is also
enabled in the question settings.

The intention is simply to make it a little harder for students
to copy from each other.

This only applies to questions that have multiple parts, such as
Multiple Choice or Matching Questions. For multiple choice questions
the order of the answers is shuffled only when this option is set to
"Yes". For matching type questions the answers are always shuffled,
this setting controls whether in addition the order of the
question-answer pairs is shuffled.